Bulk Posterize Image Effect Free
Runs 100% in your browser — your files never leave your device.
Give a whole gallery a retro poster look, stylize a set of thumbnails into flat colors, or create consistent graphic art from many photos. The level count you pick is applied to every image, and everything is processed on your device.
How it works
- 1
Add your images
Drop one or more JPG, PNG, or WebP files into the box. Nothing is uploaded.
- 2
Posterize the batch
Set the control once — it is applied to every file in the batch.
- 3
Download the results
Process the batch, then download each edited image individually.
About this tool
Batch posterize workflows
Give a whole gallery the same retro poster treatment, stylize a set of thumbnails into consistent flat color, or prep a series of images for screen printing — where every frame needs the same limited palette. Sets stay perfectly matched. For one image at a time, the single-image posterize tool does the same job.
One setting, every file
One level count drives the whole batch: set it once and every image receives the identical posterize treatment — the same pipeline the single-image version runs, applied to each file in turn. Nothing is uploaded: the batch is processed on your device, originals are never modified, and you download each finished image individually in its original format.
Frequently asked questions
How many images can the batch handle?
As many as your browser can hold in memory — dozens of typical photos are routine. Very large batches simply take proportionally longer, and every file is processed on your own device.
Is the batch result identical to the single-image posterize tool?
Yes — every file runs through the same posterize pipeline as the single-image version. One setting drives all of them; nothing is averaged or compromised across the batch.
Do all images end up with the same number of colors?
The same number of levels per channel, yes — so the visual complexity matches across the set even when the source photos differ wildly. That consistency is exactly why posterizing batches so well.